Mobile scoop for lift trucks



May15, 1951 1.. T. GRAVES MOBILE SCOOP FOR LIFT TRUCKS Filed Jan. 6,1948 4 Sheets-Sheet 1 INVENTOR.

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L. T. GRAVES MOBILE SCOOP FOR LIFT TRUCKS May 15, 1951 4 Sheets-Sheet 2Filed Jan. 6, 1948 v v INVENTOR. L/oyc/ mar/72012 Graves ATTORN svg.

4 Sheets-Sheet 3 May 15, 1951 TI. GRAVES MOBILE SCOOP FOR LIFT TRUCKSFiled Jan. 6, 1948 INVENTOR. Lloyd 7601122012 Graves ATTORN EY$.

M M RN flll MN \m Ym n q 1 km H..\\O o N m. n O o 0 o 0 MN 0 o Y a N w II, e \W .I o m; l H n \No Wm an u o ow v Tha 4 v wwv N W \Q L. T. GRAVESMOBILE SCOOP FOR LIFT TRUCKS May 15, 1951 4vSh eets-Sheet 4 Filed Jan.6, 1948 UNITED STATES PATENT OFFICE MOBILE SCOOP FOR LIFT TRUCKS LloydThurman Graves, North Vancouver, British Columbia, Canada, assignor, bydirect and mesne assignments, of sixty-six and two-thirds per cent toWilliam Blaylock Steele, Vancouver,

British Columbia, Canada Application January c, 1948, Serial No. 769 24Claims. (01. 214-120) This invention relates to a mobile scoop for lifttrucks, namely a scoop carried upon a vehicle and having atrunnion-mounted bucket supported for bodily movement in a vertical Theinvention has the Sti l 5 E 21??? 9 38013 01 devising a mechanism of thedescribed character in which said crank-activating bar is caused to beanchored to and released from the frame of the vehicle automatically byvertical moveplane and with the bucket being rotatable about 5 mentsgiven to the scoop bucket in conjunction the center of its trunnions asan axis from a com with controlled tilting of the standard. teredloading position into either of two oppo- Having the foregoing and stillother objects site extremes of rolling movement, the one for andadvantages in view, and which will appear placing the bucket in aload-carrying position and be understood in the course of the followingand the other for placing the bucket in a loaddescription and claims,the invention consists dumping position. This application is a conin thenovel construction and in the adaptation tinuation-in-part of my pendingapplication and combination of parts hereinafter described filed in theUnited States Patent Office June 12, and claimed. 1946, Serial No.676,238, now abandoned in favor In the accompanying drawings:

of prosecuting the common subject matter in 5 Figure 1 is a fragmentaryside elevational view the present application. The present scoop is ofwith parts broken away and in section to illus- -that character in whichthe energizing force, and tr'ate a mobile scoop constructed to embodythe which is or may be hydraulic, is applied to the preferred teachingsof the present'invention, the performance of its bucket-rolling work byconbucket being here shown in a lowered loading nections which areessentially mechanical in 20 position. nature. Fig. 2 is a horizontalsectional view taken to It is an important object of the present inasomewhat larger scale on line 2-2 of Fig. 1. vention to incorporate anupright post or stand- Fig. 3 is a fragmentary side elevational view ardas a guide for the bodily vertical movement with parts broken away andin section and illusof the bucket, to give this standard a pivotaltrating the upright standard as having been footing enabling the same tobe tilted either fortilted rearwardly to respensively roll e bucketwardly or backwardly, and to so tie in this standinto load-carryingposition, the scale correspondard with said referred-to mechanicalconnecing to that of Fig. 2. tions as to effectuate a rollingof thebucket in Fig. 4 is a fragmenta y Side elevatio al View direct responsetothe tilting of the standard. ill strating h u k as having b n ev d Itis a further and important object to engi and p e Scale here p oy eneersaid mechanical connections such that only pe di to that O Fig. 1; anda, minor degree of tilt transmitted to the stand- Fi 5 is a r ver e v ral io al vi w ard will transmit to the bucket a major degree on thejogged line 5-5 of Fig. 1. of rolling movement. The vehicle which I haveillustrated and The invention has the still further and imwhich giv smobility to the s op stru tur o portant object of providing anarrangement in the present invention is indicated as providing which thetilting of the standard is accomtwo traction wheels at the front,designated by plished by a connection which is made with the e numeralIll, and having a Single steerable foot rather than, as has beenheretofore usual, 40 Wheel shown) at the rear An eperators with the headend of the standard, thus obviatseat is sh wn at I, and t r ar pr vid dring the objection of having any load-stressed tain necessary controlsboth for the operation member above the head of the operator. of-the'vehicle and for the rolling and hoisting of It is a further object stillto devise a perfected the scoop-bucket'but other than for theshowmechanism by which to tilt the bucket and one, ing of a trip-cord l2no effort is made to detail more especially. embodying a crank linked toany of the scoop-bucket controls. the bucket and'fulcrumed for. movementabout Supported from pedestal blocks I3 bolted to the a center which. isshiftable bodily with the frame at the front end thereof is a transverseupright standard about the tilt-axis of the latshaft l4, and this shaftforms a pivot mounting .ter, and including, as one element of saidmechfor a pair of upright posts l5-l6 disposed in lat- .anism, ananchoring bar one end of which conerally spaced relation and rigidlycoupled top and nects with the crank and the other end of which, bottomby tie-bars l1 and [8 to form a unitary to accomplish activation of thecrank, is arstructure. The two posts are each of channel ranged andadapted to be localized in relation to construction with the gutters infacin relation, the frame of e supportin vehicle. and there is slidablyassociated therewith an inner framework similarly composed of a pair oftransversely-tied channel members denoted I9 and 20, and which likewisehave their gutters in facing relation. The slide connection between saidouter and inner channel members comprises verticallyspaced sets ofrollers 2i journal-mounted from the inner channel members and working inthe gutters of the outer channel members, and there is also provided aguide roller 22 at the head end of each outer channel. This telescopingframework, hereinafter termed the standard, is given controlled tiltingmovement through a limited degree of travel working in oppositedirections from a median center, preferably 10 out of the perpendicularin a forward direction and out of the perpendicular in a rearwarddirection, and such movement is indicated as being effected throughmeans of piston rods 23 en aging the bottom ends of the outer posts l5l6and having their piston principals received in double-acting hydrauliccylinders 24. In lieu of this indicated hook-up, and which I haveelected to portray only for purposes of simplifying the illustration,the structural assembly which I actually utilize employs only a singledouble-acting cylinder and this cylinder, exerting thrust in a directionlongitudinal to the vehicle, activates a crank arm which is made fast toa pivot shaft extending transverse to the vehicle, the pivot shaft beingprovided upon its two ends with crank arms which connect by their freeends one with one side and the other with the other side of the uprightstandard. For extending the telescoping standard there is provided ahydraulic cylinder footing upon the bot- 1 tom cross-tie l8 and havingthe piston 25 which is received therein exerting its thrust upon thecross-member which ties the upper ends of the inner posts together.There is secured upon the exposed upper sections of said piston afitting which presents trunnion pins 26 for the journalmounting, at eachside of the piston, of a respective sprocket wheel 21. Passing overthese sprocket wheels are chains 28, one end of which is anchored as at29 to the cylinder and the other end of which is attached, as at 30, toa carriage 3| movable vertically in relation to the telescoping standardand deriving its slide mounting from sets of rollers 32 working in thegutters of the inner channels l9 and 20.

This carriage, Or that is to say the body proper of the same, lies tothe front of the telescoping standards and carries a transversepivot-shaft 33 from which there is hung a harness 34 having a U-shapedplan configuration, the harness serving as a mounting for thescoop-bucket 35v which, for its pivot support, presents at each side atrunnion pin 36 journaled in a respective cheek-arm 31 of theharness.

Now to describe the bucket-rolling mechanism, there is welded orotherwise secured at opposite sides of the harness and in surmountingrelation to the cross-arm of the U a pair of cb-axial pillow-blocks 38.Journaled in these pillow-blocks is a rocker-shaft 40, and made integralwith the rocker-shaft are levers producing, at each side of the 'bucketslongitudinal center line, a substantial bell-crank one arm 4| of whichis placed outside and the other arm :12 of which is placed inside therelated pillow block. The arm M connects by its free end with a link 43which connects in turn to a side wall of the bucket by a pin 4 and thearm 42 pivotally connects by its free end with a horizontal anchor bar45. This latter connection, denoted 46, is made at a point intermediatethe ends, and such, more especially, as to present a long arm 47extending rearwardly and a short arm 48 extending forwardly from thepivot, said long arm being of a length to overlie the front end of thevehicle proper. Such anchor bar, and as can be best seen from aninspection of Fig. 2, is desirably fabricated from an extended length ofbar stock bent upon itself to produce an open bite, the bite beinglocated at the rear extremity of the long arm and having the eye 58which is thereby formed boxed in at the rear by a welded stay 5!. Weldedupon the underside of the arm and leading forwardly from the stay is awiping apron '52. The eye 50, by predetermined tilting movement given tothe upright standard, is caused to register with an anchoring horn 53integrated with the frame of the vehicle and by dropping over the latterlocalizes the toe of the anchor bar in relation to the Vehicle. In orderthat the anchor bar may pivot about the pin 45 'while' at thesame timecountering any tendency for the long arm to drop by its own weight,there is applied to the other or short arm 48 of the bar a balancinspring 54. Two of these balancing springs are provided, one atone sideand the other at the other side of the scoops longitudinal center, andthe same connect by one end with the harness 38 and have their other endfastened to the free end of a respective knee 55 which is made fast to across-rod 56 extending from the anchor bar at one side to the anchor barat the other side of the scoop, the ends of this rod being rigid withthe short arms of the anchor bars. The knees are jointedto permitadjustment of the angle to which the articulating legs are set, thus toassure that the'anchor bars, when in their normal floating condition,will occupy the position necessary to properly locate the same inrelation to the anchoring horns.

Completing the mechanism of the present invention is a brake comprisedof a drum 5'! carried upon a projecting end of one of the two trunnionshafts of the bucket, and receiving thereover a brake band 58 one end ofwhich is anchored, as at 60, to the harness and the other end of whichis tied to one end of a lever 61 fulcrumed to the harness as at 62, theother end of the lever .being engaged by a spring 63 the tensioned forceof which is so applied as to normally set the brake. The brake itself isso arranged as to be selfwrapping, and which is to say that the greaterthe torsional force transmitted by the weight of the buckets load to thebrake drum, the greater the resistance to which the brake band subjectssaid drum. For effecting a release of the brake, the lever BI is linkedto a compounding lever 64 terminally fulcrumed as at 65 to the harnessand having its free end connected by a shackle 66 with the trip-cord [2,the trip-cord, as previously described, extending rearwardly intoconvenient reach of the operator.

As before stated, the upright telescoping standard is tiltable throughan angle of approximately 25, and which is distributed 10 in a forwarddirection and 15 in a rearward direction from center. Separate controllevers are provided, one to accomplish the tilting action and one toaccomplish the hoisting action. Both levers automatically return to aneutral position upon being released, and the operations are such thatthe standard or the carriage, as the case may be, is, upon said release,hydraulically locked in the position then occupied. This over-alltilting travel of 25 transmits, by the linkage which I employ, arotation of the bucket approaching The operation may be described asfollows:

Let it be assumed that a previous load has .free of the horns. carryingposition and the vehicle with its sustained load is moved to the dumpingsite, where- I disposed perpendicular, or which is to say at a readingon the protractor which serves as a tilting guide for the operator. Tonow reload the bucket, the operator tilts the standard forward and theparts will then occupy the positions in which they are shown in Fig. 4,whereupon the lift-control lever is depressed to lower the bucket and,as the lip of the digging blade touches the ground, the vehicle isbacked up,

a downward push upon the back end of the bucket rolling the lip of thedigging blade upwardly. The vehicle is thereupon driven forwardly intothe pile of material being loaded and, as the penetration proceeds to apoint at which the driving wheels evidence slippage, the tilting leveris now again raised to tilt the upright standard to its rearmostposition, at the same time maintaining a forward drive to complete thefilling of thescoop as the bucket responsively rolls upwardly into theapproximate upward rolling action takes place, and which is caused bythe further thrust action transmitted from the horn-localized anchor barto the arm 42 of the bell-crank, the coincident rise of the bell-cranksfulcrum 40 as the same moves in arcuate travel about the center of thepivot-shaft M as an axis will have caused the level of the anchor bar tochange and the short arm 48 thereof will now point upwardly rather thandownwardly from the pivot 46, consequently stretching the springs 54 ina degree sufficient l to slightly tension the anchor bar. The operatorthereupon momentarily depresses the tilt-control lever to"bump theupright standard in a forward direction and this relieves the anchor barfrom its friction purchase with the anchoring horns and the tension ofthe springs 54 thereupon takes effect to lift the long arms 41 The loadis then hoisted into upon the upright standard is tilted forwardly intoan approximatecentered position (0 on the indicator dial) and thetrip-cord is pulled to ,release the brake and allow the bucket to rollby position in which it is shown in Fig. 3. As this sibility ofoverbalancing the vehicle the trip-cord clearly understood from theforegoing detailed description having particular reference to theillustrated now-preferred embodiment, but it is self-evident that minorchanges in details of construction may be resorted to without departingfrom the spirit of the invention and I therefore intend that the heretoannexed claims be read 6' p, with only such restrictions as areexpressly intro-. duced thereto.

What I claim is: V

l. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported for tilting movement by themounting, a swivel-mounted scoop-bucket supported by said standard forbodily vertical movement of the bucket and its swivel mounting, powermeans for raising the bucket, power means for tilting the standard, andmeans acting automatically in response to rearward tilting movement ofthe standard to cause the bucket to roll about the swivel center of thebucket as an axis from a load receiving into a load-carrying position.

'2. A mobile scoop comprising, in combination with a mobile mounting, anupright telescoping standard pivotally supported for tilting movementupon said mounting, a swivel-mounted scoop-bucket supported by saidstandard for bodily vertical movement of the bucket and its swivelmounting, power means for extending the telescoping sections of thestandard and coincidently raising the bucket through a travel'pathapproximating the overall height of the extended standard, power meansfor tilting the'standard, and means actin automatically in response torearward tilting movement of the standard to Y ard located at the frontof the vehicle and pivotally supported by the latter for tiltingmovement about a transversse horizontal axis spaced above the bottom endof the standard, a scoop-bucket carried by the standard, a source ofhydraulic energy carried by the vehicle, and means operated from saidenergy source and connecting with the foot of the standard for tiltingthe latter, said means comprising a hydraulic ram and. an associatedco-axial connectin rod arranged for unitary enolwise movement along alongitudinal horizontal axis.

4. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported for tilting movement by themounting, a swivel-mounted scoop-bucket supported by said standard forbodily vertical move- .ment of the bucket and its swivel mounting, re

leasable brake means for resisting rotation of the bucket about itsswivel center, powered means for raising the bucket, powered means fortilting the standard, and means made responsive to tilting movements ofthe standard for automatically rolling the bucket about its swivelcenter as an axis.

5. A mobile scoop comprising, in combination with a mobile mounting, anupright standard "pivotally supported for tilting movement by saidmounting, a swivel-mounted scoop-bucket supported by said standard forbodily vertical movement of the bucket and its swivel-mounting,releasable brake means acting when set to prevent swivel movement of thebucket in one direction of rotation, power means for raisin the bucketand for tilting the standard, and means made responsive to a rearwardlydirected tilting movement of the standard for automatically rolling thebucket in the other direction of the latters rotation.

. 6. A mobile scoop comprising, in combination with a mobile mounting,an upright standard amass;

nivqtallysupported b the mounting for tilting movement fore and aft of aperpendicu lar center, a swivel-mounted scoop-buc supp rted by saidstandard for bodily vertical movement of the bucket and its swivelmounting, a brake drum fast to the bucket and placed concentric to theswivel axis of the latter, a releasable self-wrapping brake-bandfunctional to, the drum and acting, when set, to prevent swivel movementof the bucket in a loaddumping directionv of rotation, power means forraising the bucket and for tilting the standard, and means maderesponsive to a rearwardly directed tilting movement of the standard forautomatically rolling the bucket in a load-carrying direction ofrotation.

'7. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported by the mounting for tiltingmovement fore and aft of. a perpendicular center, a. swivel-mountedscoop-bucket supported by said standard for bodily vertical movement ofthe bucket and its swivel mounting, an anchoring member movable bodilywith said, bucket in the vertical, movement of the latter, meansprovided by said. mobile. mounting arranged to automatically engage andvlocalize said anchoring member upon a. location of the bucket at thelower extreme of its vertical travel, means operatively interconnectingsaid anchoring member with the bucket and acting by a rearward tiltingof the standard to automatically roll the bucket about the. lattersswivel center as an axis, and power means for raising the bucket and fortiltin the standard.

8. A mobile scoop comprising, in combination with. a mobile. m un in aupr ht stand piyotally supported by the mounting for tilting movementfore and aft of a perpendicular center, a swivel-mounted scoop-bucketsupported, by said, standard for bodily vertical movement of the bucketand its swivel mounting, an anchoring member also movable bodily withsaid bucket in the vertical travel of the latter, power means forraising the bucket and for tilting the standard, means provided by saidmobile mounting arranged to automatically engage and localize saidanchoring member to the mobile mounting upon a descending movement ofthe bucket into the lower extreme of the latters vertical travel, meansoperatively interconnecting said anchoring member with the bucket andactin by a rearward tilting of the standard to automatically roll thebucket in a load-carrying direction of rotation, and releasable meanspreventing the bucket from rolling in a load-dumping direction ofrotation.

9. The mobile scoop of claim 8 in which the means last recited comprisesa brake drum and a complementing self-wrapping brake band and with thebrake drum being fast to the bucket and placed concentric to the swivelaxis of the latter.

10. A mobile scoop comprising, in combination with a mobile mounting, anupright standard .pivotally supported for tilting movement by themounting, a swivel-mounted scoop-bucket supported by said standard forbodily vertical movement of the bucket and its swivel mounting, ananchoring member also movable bodily with said bucket in the verticaltravel of the latter, power means for raising the. bucket and fortilting the standard, means provided by said mobile mounting arranged bydescendin movement of the bucket to automati lly n a said a c oringmember as, the bucket. reaches the lower extreme f. its. vert cal.traveL, mea s op ativdy n erconnecting said anchorin member with thebucket and acting automatically by a rearward tilting of the standard.to roll the bucket, and means functional upon said anchoring member to,automatically disengage the latter from the mobile mounting responsiveto a following bump.-tilting of the standard in a forward direction.

11. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported for tiltin movement by themounting, a swivelrmounted scoop-bucket supported by said standard forbodily vertical movement of the bucket and its swivel mounting, anupstanding anchoring horn provided by the mobile mounting, a member alsomovable bodily with said bucket in the latters vertical travel andarranged, by descending movement of the bucket to lodge itself over saidanchoring horn, and means operatively interconnecting said horn-engagingmember with the bucket and acting automatically when the member islodged over said anchoring horn and in response to a rearward tilting ofthe standard to transmit movement to the bucket. rolling the latterabout its swivel center as an axis.

12. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported for tilting movement by themounting, a swivel-mounted scoop-bucket supported by said standard forbodily vertical movement of the bucket and its swivel mounting, an

upstanding anchoring horn provided by the mobile mounting, a pivoted baralso movable bodily with said bucket in the latters vertical travel andarranged by descending movement of the bucket to lodge by its free endover said anchoring horn, power means for tilting the standard and forraising the bucket, means operatively interconnecting said pivoted barwith the bucket and acting automatically when the bar is lodged over thehorn and in response to a rearward tilting of the standard to transmitrolling movement to the bucket, and spring means normalizing the bar toa given position, said spring means being tensioned by saidbucket-rolling tilting of the standard and acting to automaticallydisengage the bar from the horn responsive to a following bump-tiltingof the standard in a forward direction.

13. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported by the mounting for tiltingmovement about a, transverse horizontal axis, a swivel-mountedscoop-bucket supported by said standard ior bodily vertical movement ofthe bucket and its swivel mounting, power means for tilting the standardand for raising the bucket, a. pivoted bar also movable bodily with thebucket in the latters vertical travel and arranged to be releasablyconnected by its free end with the mobile mounting when the bucketoccupies its lowered position, means operatively interconnecting saidpivoted bar with the bucket and acting automatically when the bar isconnected with the mounting and in response to a rearward tilting of thestandard to transmit rolling movement to the bucket, and spring meansnormalizing the bar to a given position, said spring means beingtensioned by said bucket-rolling tilting of the standard and acting toautomatically disconnect the bar from the mounting responsive to afollowing bump-tilting ofthe standard in a forward direction; l

14. A mobile scoop comprising, in combination mounting when the bucketoccupies its lowered position, means operatively interconnecting saidpivoted bar with the bucket and acting automatically when the'bar isconnected with the mounting'and in response to a rearward tilting'of'the standard to transmit rolling movement to the bucket, and springmeans normalizing the bar to a given position, saidspring meansbeingtensioned bysaid bucket-rolling tilting of the standard and actingto automatically disconnect the bar from the mounting responsive to afollowing bump-tilting of the standard in a forward direction. Y 15. Amobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported by the mounting for tiltingmovement about a transverse horizontal axis, a harness supported forvertical movement by said standard, a scoop-bucket swivel-mounted insaid harness, power means for tilting the standard and for raising thebucket, a bell-crank fulcrumed to the harness and linked by one of itslever arms to the bucket such as to roll the bucket about its swivelaxis by rocking action of the bellcrank, and a bar pivotally attached tothe other arm of the bell-crank and arranged to receive an anchoring fixfrom the mobile mounting whereby upon tilting of said standard to rockthe bellcrank.

16. The mobile scoop of claim 15' having releasable brake means adaptedto resist rotation of the bucket about its swivel axis.

1'7. A mobile scoop comprising, in combination with a mobile mounting,an upright standard pivotally supported by the mounting for tiltingmovement about a transverse horizontal axis, a harness supported forvertical movement by the standard, a scoop-bucket swivel-mounted in saidlevel of the standards pivotal axis, a connection frorn-one arm ofsaidbell-crank to the bucket acting to roll the bucket by rocking action ofthe bell-crank, a bar pivotally attached to the free end of thebell-cranks other arm and arranged 'to receive an anchoring fix from themobile mounting whereby upon tilting of said standard torockthebell-crank, and spring means normalizing the bar to a given positionand tensioned by said bucket-rolling tilting oi the standard,

19. A mobile scoop comprising, in combination witha mobile, mounting, anupright standard 4 pivotally supported by the mounting for tilting-movement about a transverse horizontal axis, a

harness supported for vertical movement by the standard, a scoop-bucketswivel-mounted in said set, to hold the bucket against rotation in a,load-dumping direction, power means for tilting the bucket and forelevating the harness, a

,' transverse pivot-shaft receiving a journal mounting from the harnessand extending from one to the other side limit of the latter, a pair ofcrank levers fixedly carried upon an end of said pivot-shaft, ananchoring horn provided by the mobile mounting at one side of the scoop,an approximately horizontal thrust bar extending fore and aft asrespects the bucket and pivoted intermediate its ends to the freeextremity of harness, power means for tilting the standard and l forraising the bucket, a bell-crank fulcrumed to the harness for rockermovement about a transverse horizontal axis located above the level ofthe standards pivotal axis, a connection from one arm of said bell-crankto the bucket acting to roll the bucket by rocking action of thebellcrank, and a bar pivotally attached to the .free end of thebell-cranks other arm and arranged to receive an anchoring fix from themobile mounting whereby upon tilting of said standard to rock thebell-crank.

18. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported by the mounting for tiltingmovement about a transverse horizontal axis, a harness supported forvertical movement by the standard, a scoop-bucket swivel-mounted in saidharness, power means for tilting the standard and for raising thebucket, a bell-crank fulcrumed to the harness for rocker movement abouta transverse horizontal axis located above the one of said crank leversand arranged upon a lowering of the harness to have its rear extremitylodge over said anchoring horn and responsively rock the pivot-shaftupon a rearward tilting of the standard, connection from the freeextremity of the other crank lever to the bucket acting by said rockingmovement of the pivot-shaft to roll the bucket, counterparts of saidcrank levers, thrust bar, horn, and bucket-rolling connection at theother side of the scoop, a cross-shaft connecting the forward ends ofthe two thrust bars, and extension springs attached by one end to theharness and by the other end to the crossshaft, said springs normalizingthe thrust bars to a given position and being tensioned by saidbucket-rolling tilting of the standard whereby to automatically free thethrust bars from the anchoring horns responsive to a followingbump-tilting of the standard in a forward direction.

20. A mobile scoop according to claim 19, said brake band beingspring-set, and an assembly of compounded levers operativelyinterconnected with the brake band for releasing the brake against thebrake-setting force of the spring.

21. A material-handling vehicle comprising, in combination with a mobilemounting, an upright standard located at an end of said mounting andpivotally supported by the latter for tilting movement about atransverse horizontal axis spaced above the bottom end of the standard,a material-handling device carried by the standard, a source of power,and means powered off said source and making connection with thestandard at a point below the standards pivotal axis for tilting thestandard, said means comprising a hydraulic ram and an associatedco-axial connecting'rod arranged for unitary endwise movement along alongitudinal horizontal axis.

22. A mobile scoop comprising, in combination with a mobile mounting, anupright standard pivotally supported for tilting movement by themounting, a swivel-mounted scoop-bucket supported by said standard forbodily vertical move- 11 iner'i't of the bucket and it's swivelmounting, power-operated means for raising the bucket and for tiltingthe standard, and means acting automatically in response to rearwardtilting movement of the standard to cause the bucket to -r'ol'l aboutthe swivel center of the bucket as an aids from a load-receiving into aload-carry i'ng position, a 4

-23. 'A 'mobile scooip comprising, in combination with a mobilemounting, an upright standard p votany supported for tilting movement bythe mounting, a swivel-mounted scoop-bucket supported by said standardfor bodily vertical movement of the bucket and its swivel mounting,power-operated means for raising the bucket and for tilting thestandard, an anchoring member r'riovable bodily with said bucket in thevertical travel of the latter, means provided by the mobile mountingarranged iipon'a lowering of the bucket to a predetermined point to beengaged by said withering member and by said engagementober'a'ti'ng tolocalize the anchoringmember, "and operative interconnection from theanchoring member to the bucket acting when the former "is localizedandin response to tilting movement of the standard to roll the bucket.

-24. A mobile scoop'com' 'risin inc'dmbiha'tion with a mobile mounting,"an upright standard pivotally supported for tilting movement by themounting, a "swivel-mounted scoop-bucket sup- 12 ported by saidstandard, power-ofieratedfxneans ort lt thest ndardian ar ccupying approximatejhorizontal position transverse to the pivotal axisl-oisthestandard and arranged to take. a localizing M purchase from, the mountinand operativ in nn ction om said, armetothe bucketactins. om ca y by thelo aliz g. of th to m r, and i re p se t -a, ti1ting ofwthestandard tqroll thebucket about its swivel axis irom a load-receiving into aloadcarr'ying position.v V. i v

LLOYD TI-IURMAN GRAVES.

7 e'm iin The foiiowiu references are or record in the me or this a1 IPATENTS mate:

